Taper attachment for lathes



Jan. 16, 1923. 1,442,661. w. F. GROENE.

TAPER ATTACHMENT FOR LATHES.

FILED JUNE 8, 1921.. 3 SHEETS--SHEEY l.

Jan. 16, 1923.

1,442,661. w. F. GRUENE.

TAPER ATTACHMENT FOR LATHES. FILED JUNE 8,1921.

3 SHEETS-SHEET 2 BSHEETS-SHEET 3.

W. F. GROENE. TAPER ATTACHMENT FOR LATHE& FILED JUNE 8. 1921Jan.16,1923.

Patented dan. l5, 19232.

p tirati WILLIAM IE. GROENE, OF CINCINNATI, OHIO, ASSIGNOR TO THE R. K'.LE BLDND MACHINE TOOL COMPANY, OF CINCINNATI, OHIO, A CCRPORATION OFDELA- WARE.

TAPER ATTACHMENT FOR LATHES.

Application led June 8,

To all whom it may concern Be it known that I, VILLIAM F. GROENE, acitizen olf the United States, residing at Cincinnati, county otHamilton, and State of Ohio, have invented an Improvement in TaperAttachments for Lathes, of which the following description, inconnection with the accompanying drawings, is a specification, likecharacters on the drawings representing like parts.

This invention relates to taper attachment 'for lathes whereby, as thelathe tool is moved longitudinally of the lathe, it will also be movedtransversely ct the lathe Aat a speed bearing a predetermined relationto the movement longitudinally of the lathe.

Two types of taper attachments for lathes are now well known; in onetype the taper guide rail is supported by the lathe carriage, and in theother type the taper guide rail is supported from the lathebed by meansotl a bed bracket. The present invention relates more particularly tothe latter type, although various features of the present invention arewell adapted for either type of taper attachment.

In taper attachments for lathes, it is customary to provide a taperguide rail having a sliding shoe which is caused to slide along thetaper rail during the use of the taper attachment, but the shoe usuallyfits tightly upon the taper rail to prevent play from occurringtherebetween, and as a result, considerable torce is often required tomove the.

shoe along the rail, particularly if the parts are not well lubricated.

An important feature of the present invention therefore, consists in ataper attachment of the type above indicated which is so constructedthat the cross feed screw is entirely relieved from lateral bendingforces, and from longitudinal stresses throughout the use of the tapermechanism.

Another feature ot the invention consists in so constructing the taperattachment that the cutting tool may be easily and quickly placed underits control, and released therefrom.

The above and other novel features of the invention will appear morefully from the following description and the drawings.

The accompanying drawingsvillustrate a good, practical form of theinvention, the

1921. Serial No. 476,037.

details of which may be modified within the true scope thereof, asdefined by rthe claims.

ln the drawings Figure 1 is a vertical. transverse sectional view takenthrough the lathe bed and its carriage.

Fig. 2 is an enlarged plan view of the taper attachment and a portion ofthe carriage, showing the taper attachment in use.

. Fig. 3 is a view similar to Fig. 2 but showing the taper attachmentout of operation; and

Fig. 4 is a rear elevation of the parts shown in Fig. 3.

In the drawings, 10 designates the lathe bed having the carriage 11slidably mounted thereupon; and mounted upon the carriage is thecross-slide 12 which supports the toolcarrying mechanism 13. Theconstruction ot these parts forms no part of the present invention, andthey may be ol the usual or any preferred embodiment.

In the present embodiment of the invention, the cross-feed screw 14 isoperatively connected to the`cross-slide 12 by suitable means such as anut 15 secured to the crossslide by a shank 16 and nut 17, and the rearend ot the screw 14 is rotatably secured to a relatively long sleeve 18.In the present instance the rear portion of the screw 14C eX- tendsthrough the sleeve 18 and is journaled therein, thrust bearings 19 andQ0 being provided upon the screw at the ends of the sleeve to preventrelative longitudinal movement between the sleeve and screw.

The sleeve 18 is supported by the lathe carriage 11 tor sliding movementtransversely ot the lathe, and to this end, in the embodiment shown, oneend portion ot' the sleeve 18 is slidably received in a guide-way 2lwhile the opposite end portion ot the sleeve is slidably received in aguide-way7 22 of the out-bracket 23. The bracket Q3 inay be given theconstruction shown (see Fig. 2) and may be rigidly secured to thecarriage 11 by suitable means such as bolts Q4. The arrangement justdescribed is such that the sleeve 18 is permitted to slide in thedirection of its length, but is strongly supported against displacementrelatively to the carriage in a direction transversely to the length ot'the sleeve.

As stated, the present invention relates more particularly to the typeof taper attion of the bracket 25 has a 'tace plate 29 upon which thetaper rail 80 is pivotally mounted by the pivot pin 31. Upon the taperrail 30 is slidably mounted a shoe 32 adapted to be secured to thesleeve 18 in a manner to be described.

The taper rail 30 is adapted to be adjusted angularly about the pivotpin 3l, and various means may be provided for effecting this adjustment.Thd means shown consists of a threaded bolt 33 having threadedengagement with a downwardly extending bolt or stud 34. The tace plate29 is provided with a curved slot 35 to clear this bolt and a nut 36upon the lower end. ot' the bolt serves to clamp the taper rail to thefaceplate in the desired position. The adjusting bolt 33 has a shoulder37 mounted in a socket in the face plate which serves to hold the boltfrom moving in thel direction of its length, and this bolt may have ahead 38 for rotating the bolt to effect adjustment of the taper rail.

In the embodiment of the invention disclosed, it is desirable co-providemeans for securing the sleeve 18 to the sliding shoe 32 during the useor' the taper attachment, and to release the sleeve from the shoe and tosecure the sleeve against movement relatively to the carriage during thenormal operation o the lathe. This may be satisfactorily accomplished byproviding a bolt 39 insertable in a hole 40 within the sleeve and havingthreaded engagement with a threaded socket 41 in the shoe to operativelyconnect the sleeve and shoe. Then it is no longer desired t0 use thetaper attachment, the bolt 39 isrenioved and is inserted in a hole 42extending transversely through the out-bracket 23. 1n this position thethreaded end ott-he bolt 39 engages a threaded socket 13 in anenlargement fle-1 upon the sleeve 18 and serves firmly to clamp a face45 of this enlargement against the inner face of the bracket 23.

When the sleeve 18 is secured by the bolt 39 to the shoe, and thecarriage 11 is moved along the lathe bed, the shoe will be moved alongthe taper rail 30 and will impart movementV to the sleeve 18, cross-feedscrew 1-1, and through the latter to the crossslide 12 in a directiontransversely of the lathe. The connection between the sleeve and shoeserves to slide the shoe along the taper rail, but since the sleeve 18is strongly supported by the guide-ways 21 and 22, it is well adapted towithstand the lateral forces to which it may be submitted, and the end.of the cross-feed screw within the sleeve is relieved Jfrom all lateralbending forces.

The .forward end 4.6 of the cross feed screw is slidably received in asleeve- 47 to which it is keyed, and this sleeve may be rotated by ahandle 18 to rotate the cross feed screw, in this manner the movement ofthe screw in a direction of its axis during the use of the taperattachment is taken care of.

1t is desirable to provide means for rigidly connecting the cross-feedslide 12 to the sleeve 18 when the taper attachment is in use and afterthe screw 14 has been rotated to adjust the cross-slide. To this end, inthe embodiment shown, a slotted bar i9 is provided, one end of which isiirmly secured to the cross-slide 12 byl a pin 50 and bolt 51. The slot52 of the bar is adapted to slidably receive the clamping bolt 53 havingthreaded engagement withV the sleeve 18. The arrangement is such thatthe bar 49 may be firmly clamped against the upper 'tace ot the sleeveby tightening the bolt 53 to force the clamp 54C against the upper faceoit the bar.

From the foregoing description when read 'in connection with thedrawings, it will be seen that the cross-feed screw is relieved :tromall lateral bending forces throughout the use of the' taper attachment,and'that by tightening the clamping nut 53, a rigid connection is formedbetween the cross-slide and sleeve which relieves the cross-feed screwfrom longitudinal stresses. 1t will also be apparent' that the taperattachment may be easily and quickly brought into operation, and theparts may again be restored to normal operation simply bv manipulatingthe bolt 39.

What is claimed is:

1. ln a taper attachment for lathes, the combination of a lathe-bed, alathe-carriage having a cross-slide mounted thereupon,a bracket uponsaid carriage and having a guide-way, a taper rail having a bracket tosupport 1t from the lathe bed, a sliding shoe upon thetaper rail, asleeve slidably mounted 'in said guide-way, a cross-feed -screwconnected to the cross-slide and having an end extending through andjournaled in said sleeve, and means for connecting said sleeve to saidshoe.

2. 1n a taper attachment for lathes, the combination of a' lathe-bed, alathe Vcarriage having a cross-slide mounted thereupon, a taper railhaving a bracket to support it from the lathe bed in a fixed position, a'sliding shoe upon the taper rail and adapted to be slid along the railby movement of the lathe carriage, a long sleeve having one endextending into sliding engagement with the lathe-carriage and the otherend slidably supported by a rear bracket upon the lathecarriage, across-feed screw connected to the cross slide and having one endjournaled in said sleeve, and means for removably securing said sleeveto the shoe. p

3. In a taper attachment for lathes, the combination ot a lathe-bed, alathe-carriage having a cross-slidemounted thereupon, a taper railhaving a bracket to support it from the lathe-bed in a fixed position, asliding shoe upon the taper rail, a long sleeve having one end extendinginto sliding engagement with the lathe-carriage and having its other endslidably supported by a bracket upon the lathe carriage, a cross- 'eedscrew connected to the cross-slide and having an end journaled in saidsleeve, and means to secure said sleeve either to said shoe or in fixedrelation to the lathe-carriage.`

4. In a taper attachment for lathes, the combination of a lathe-bed, alathe-carriage having a cross-slide mounted thereupon, a taper railhaving a bracket to support it .from the lathe bed, a sliding shoe uponthe taper rail, a rearwardly extending bracket upon the lathe carriage,a slee-ve having sliding engagement with said bracket, ya cross-feedscrew connected to the cross-slide and rotatably secured to said sleeve,and means for securing the sleeve either to the sliding shoe or rigidlyto said bracket.

5. In a taper attachment for lathes, the combination of a lathe-bed, alathe-carriage having a cross-slide mounted thereupon, a

taper rail having a bracket to support it from the lathe bed, a slidingshoe upon the taper rail, a rearwardly extending bracket upon the lathecarriage, a Sleeve having sliding engagement with said bracket, across-feed screw connected to the cross-slide and having an endjournaled in said sleeve, means for securing the sleeve to the slidingshoe, and a bar Jfor rigidly connecting the cross-slide to the sleeveand constructed to be clamped to the sleeve in dilerent positions otadjustment.

6. In a taper attachment for lathes, the combination of a lathe carriagehaving a. cross-slide mounted thereupon, a rearwardly extending bracketupon the carriage and having a portion in spaced relation to the rearportion of the carriage, a long sleeve having sliding engagement withthe spaced portion of the bracket and the carriage and extending acrossthe space therebetween, a cross-feed screw connected to the cross slideand extending rotatably through said sleeve, a taper rail having a shoeslidably mounted thereupon, and means for securing an intermediateportion of the sleeve to the shoe.

7. In a taper attachment for lathes, the combination of a lathe-bed, alathe-carriage having a cross-slide mounted thereupon, a taper railhaving a bracket to support it 'from the lathe-bed, a slidingshoe uponthe taper rail, a long sleeve, means upon the carriage slidably engagingthe ends ot the sleeve to support it, a cross-'feed screw eX- tendingthrough the sleeve and journaled therein and connected to thecross-slide, and means for connecting the sleeve to the sliding shoe.

8. In a taper attachment for lathes, the combination of a lathe-bed, alathe carriage having a cross-slide mounted thereupon, a taper railhaving a bracket to support it from the lathe bed, a shoe slidablymounted upon the taper rail, a cross-feed screw connected to thecross-slide, a sleeve having an end of the cross-feed screw journaledtherein, means for supporting the sleeve for sliding movementtransversely of the lathe including bearings engaging the ends of thesleeve, and means for securing the sleeve to the shoe.

In testimony whereof, I have signed my name to this specification.

VILLIAM F. GROENE.

